CN105779893B - Alloy cast steel for brake disc of high-speed train and the brake disc of high-speed train that is manufactured by the alloy cast steel - Google Patents
Alloy cast steel for brake disc of high-speed train and the brake disc of high-speed train that is manufactured by the alloy cast steel Download PDFInfo
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- CN105779893B CN105779893B CN201610235376.XA CN201610235376A CN105779893B CN 105779893 B CN105779893 B CN 105779893B CN 201610235376 A CN201610235376 A CN 201610235376A CN 105779893 B CN105779893 B CN 105779893B
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- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 130
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 123
- 239000000956 alloy Substances 0.000 title claims abstract description 123
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 88
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 57
- 239000010937 tungsten Substances 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 44
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 36
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000011733 molybdenum Substances 0.000 claims abstract description 35
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 33
- 239000011651 chromium Substances 0.000 claims abstract description 33
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 32
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 32
- 239000011572 manganese Substances 0.000 claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 27
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 24
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 24
- 239000010703 silicon Substances 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 21
- 239000011574 phosphorus Substances 0.000 claims abstract description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000005864 Sulphur Substances 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 42
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 42
- 239000010936 titanium Substances 0.000 claims description 42
- 229910052719 titanium Inorganic materials 0.000 claims description 42
- 229910052758 niobium Inorganic materials 0.000 claims description 36
- 239000010955 niobium Substances 0.000 claims description 36
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 22
- 230000008602 contraction Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 abstract description 34
- 238000010791 quenching Methods 0.000 abstract description 28
- 230000000171 quenching effect Effects 0.000 abstract description 28
- 238000005275 alloying Methods 0.000 abstract description 13
- 239000013078 crystal Substances 0.000 abstract description 8
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 28
- 229910000831 Steel Inorganic materials 0.000 description 27
- 239000010959 steel Substances 0.000 description 27
- 238000005266 casting Methods 0.000 description 24
- 238000010792 warming Methods 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 239000000126 substance Substances 0.000 description 13
- 239000003607 modifier Substances 0.000 description 11
- 238000004321 preservation Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 208000037656 Respiratory Sounds Diseases 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 238000005496 tempering Methods 0.000 description 5
- 241000271559 Dromaiidae Species 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 229910052787 antimony Inorganic materials 0.000 description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000952 Be alloy Inorganic materials 0.000 description 1
- 238000007546 Brinell hardness test Methods 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000416536 Euproctis pseudoconspersa Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a kind of alloy cast steel for brake disc of high-speed train and the brake disc of high-speed train manufactured by the alloy cast steel, the weight percentage of component and its each component is：Alloy cast steel according to claim 1, which is characterized in that the weight percentage of its component and its each component is：Carbon 0.18~0.26%；Silicon 0.30~0.50%；Manganese 0.68~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium 1.10~1.82%；Nickel 0.90~1.50%；Molybdenum 0.65~1.02%；Vanadium 0.22~0.34%；Content summation≤0.30% of other components, wherein tungsten are less than 0.1%；Iron is surplus.The beneficial effects are mainly as follows：Rational proportion by main components such as carbon, silicon in the alloying elements such as manganese, nickel, chromium, molybdenum, vanadium and cast steel material and heat treatment, make crystal grain refinement, improve the quenching degree and thermostrength of alloy cast steel material, and normal temperature strength and elevated temperature strength have raising by a relatively large margin, and there is excellent comprehensive mechanical property.It is fully able to meet operating mode bullet train with the brake disc that it is manufactured and be required using technology.
Description
Technical field
It is 2012.6.28 that the application, which is the applying date, entitled for arranging at a high speed application No. is 201210217930.3
The division Shen of the alloy cast steel and its heat treatment method of vehicle brake disc and the brake disc of high-speed train manufactured by the alloy cast steel
Please.
The present invention relates to a kind of alloy cast steel for brake disc of high-speed train and and the high speeds that are manufactured by the alloy cast steel
Train brake disk.
Background technology
Brake disc is the EMU of the important component of high-speed train braking system, especially 250Km/h and higher speed, braking
The capability and performance of disk directly affects the property indices of EMU.When bullet train needs braking, for brake disc matter
Amount performance influence it is maximum be alloy cast steel material used in brake disc every mechanical performance index and cracking resistance energy.
Japanese Patent Laid-Open 2005-36312 provides a kind of resistance to when being suitable for 200 kilometers/hour of high-speed cruisings
Abrasivity and the preferable brake disc steel of toughness and disc brake, however due to the group of its disclosed brake disc Steel material
Distribution ratio is very wide in range, and therefore, the comprehensive performance of the disc material obtained often can not in anti-crack aspect of performance especially
Meet the brake request of higher speed grade train.Domestic existing bullet train cast steel brake disc relies primarily on import at present, and
It is expensive.
Therefore, to meet the needs of China express railway development, develop that a kind of comprehensive mechanical property is excellent, cracking resistance energy
Good, manufacture is easy, and cost-effective brake disc of high-speed train material alloys cast steel seems particularly urgent.
Invention content
The first object of the present invention is：A kind of easy manufacture, chemical constituent are provided and match reasonable, comprehensive mechanical property
Excellent, the alloy cast steel of cracking resistance energy brake disc of high-speed train good, suitable for higher speed grade is especially adapted for use in
The alloy cast steel of 250 kilometers/hour or more of brake disc of high-speed train.
The first object of the present invention is realized by series technical project that is following and advanced optimizing：
The weight percentage of a kind of alloy cast steel for brake disc of high-speed train, component and its each component is：Carbon
0.18~0.26%；Silicon 0.16~0.50%；Manganese 0.55~1.40%；Phosphorus is less than or equal to 0.03%；Sulphur is less than or equal to 0.03%；Chromium
0.90~2.00%；Nickel 0.71~1.80%；Molybdenum 0.65~1.20%；Vanadium 0.20~0.35%；Other including titanium, tungsten and niobium
The content summation of component is less than or equal to 0.30%, and wherein tungsten is less than 0.1%；Iron is surplus.
In the above-mentioned technical solutions, the metallographic structure after the alloy cast steel heat treatment is Soxhlet body tissue.Sorbite base
For body tissue for " martensite+bainite " matrix, intensity and hardness are more slightly lower, but elongation and plasticity are high,
Good combination property.Brake disc brake when, bear repeatedly cool-hot fatigue effect, it is desirable that material should have higher intensity, but have compared with
Good plasticity, materialization comprehensive performance will be got well.Therefore the cast steel material of sorbite matrix is more suitable for making the braking
Disk.
Electric induction furnace process for smelting steel in the prior art or similar steel-making may be used in the alloy cast steel of the present invention
It is prepared by technique.The casting method of the bullet train steel alloy brake disc blank, may be used common casting method.
Work of each chemical composition contained by the alloy cast steel of the present invention played in cast steels melting is described in detail below
With, content range and its preferred content range.
Carbon is to expand the element of γ phase regions, but because of the formation of cementite, cannot infinitely be dissolved.Phosphorus content increases in steel, bends
Clothes point and tensile strength increase, but plasticity and impact flexibility reduce.Therefore in order to ensure comprehensive performance that material has had, phosphorus content
It cannot be excessively high.In the present invention, by carbon content control 0.18~0.26%；Further preferred carbon content be 0.18~
0.25%。
In steelmaking process, manganese is good deoxidier and desulfurizing agent.In carbon steel when the manganese of 0.70% or more addition just
It calculates " manganese steel ", the steel of more general manganese amount not only has enough toughness, and has higher intensity and hardness, improves the quenching degree of steel,
Improve the hot-working character of steel.In the present invention, manganese content is controlled 0.55~1.40%；It is preferred that the manganese content is 0.60
~1.40%；The more preferable manganese content is 0.68~1.40%；Further preferably, the manganese content is 0.81~1.40%；More into
One step is preferred, and the manganese content is 0.84~1.20%.
Chromium can improve the intensity, hardness and wearability of steel.Meanwhile chromium can improve the elevated temperature strength of steel again, be heat resisting steel
Important alloying element.In the present invention, chromium content is controlled 0.90~2.00%, preferably chromium content is 1.00~2.00%, more
It is preferred that chromium content is 1.10~2.00%, further preferred chromium content is 1.10~1.82%, and still more preferably chromium content is
1.10~1.70%.
Nickel be expand austenite phase field element, and be also solution strengthening element, with the increase of nickel content, steel it is normal
Warm intensity and elevated temperature strength increase, and influence less, can specifically see Fig. 1, Fig. 2 to plasticity and toughness.In the present invention, by nickel
0.71~1.80%, the preferably described nickel content is 0.80~1.60% for content control；The further preferred nickel content is
0.90~1.50%, still further preferably nickel content is 0.96~1.50%；Nickel content still more preferably be 0.96~
1.50%；Nickel content still further preferably is 0.96~1.40%, further preferably 1.22~1.40%.
Molybdenum can make the crystal grain refinement of steel, improve quenching degree and thermostrength, keep enough intensity and anti-compacted at high temperature
Change ability (is stressed deforms for a long time, claim creep) at high temperature.Molybdenum is added in steel, mechanical performance can be improved；And also
It can inhibit steel alloy brittleness caused by tempering.Therefore the content of molybdenum can suitably be increased.In the present invention, molybdenum is contained
0.65~1.20%, preferred molybdenum content is 0.65~1.19% for amount control；Molybdenum content further preferably is 0.65~1.10%；Into
The preferred molybdenum content of one step is 0.65~1.02%；Molybdenum content still more preferably is 0.65~1.00%；Still further preferably
Molybdenum content be 0.65~0.96%.
Nickel energy fining ferrite grains, intensity under the same conditions, nickel can improve the plasticity and toughness of steel, especially low
Warm toughness.It is used in combination with Cr, Mo etc., the heat resistance and normal temperature strength and wearability of steel can be improved.Therefore the present invention suitably carries
The high content of nickel.
Vanadium is the excellent deoxidier of steel, be added in steel suitable vanadium can thinning microstructure crystal grain, improve intensity and toughness and resistance to
Mill property.In the present invention, content of vanadium is controlled 0.20~0.35%, preferred content of vanadium is 0.20~0.34%, further excellent
The content of vanadium of choosing is 0.22~0.34%.
In the present invention, by silicone content control in 0.16~0.50% range, preferred silicone content is 0.22~0.50%,
Preferred silicone content is 0.25~0.50%, and further preferred silicone content is 0.30~0.50%.
In the present invention, the content of phosphorus, sulphur is controlled less than or equal to 0.03%；It is preferred that phosphorus content is less than or equal to
0.03%, sulfur content is less than or equal to 0.02%；Further preferred phosphorus content be less than or equal to 0.025%, sulfur content be less than or equal to
0.013%。
In the present invention, by the content summation of the other components including the elements such as titanium, tungsten, niobium control less than or equal to
0.30%, wherein tungsten ＜ 0.1%；It is preferred that other elements include in titanium, tungsten, niobium element any one or any two or three kinds,
Its content is titanium≤0.08%, tungsten≤0.04%, niobium≤0.05%；Further preferably, other elements include in titanium, tungsten, niobium element
Any one or any two or three kinds, content is titanium≤0.06%, tungsten≤0.03%, niobium≤0.04%.
Based on the preferred of each component content described above, the present invention advocates to realize the second optimization of invention the first invention purpose
Technical solution is：The weight percentage of a kind of alloy cast steel for brake disc of high-speed train, component and its each component is：
Carbon 0.18~0.26%；Silicon 0.25~0.50%；Manganese 0.60~1.40%；Phosphorus≤0.03%；Sulphur≤0.02%；Chromium 1.00~2.00%；
Nickel 0.80~1.60%；Molybdenum 0.65~1.10%；Vanadium 0.20~0.35%；The content of other components including titanium, tungsten and niobium is total
With≤0.30%, wherein tungsten is less than 0.1%；Iron is surplus.
It is preferred that the manganese content is 0.68~1.40%, the silicone content is 0.30~0.50%.
Further preferably, the manganese content is 0.81~1.40%.
Further preferably, the manganese content is 0.84~1.20%.
Further preferably, the silicone content is 0.30~0.50%.
Further preferably, the nickel content is 1.22~1.50%
The present invention advocates that the second optimisation technique scheme for realizing invention the first invention purpose is further：One kind is for high speed
The alloy cast steel of train brake disk, which is characterized in that the weight percentage of its component and its each component is：Carbon 0.18~
0.26%；Silicon 0.30~0.50%；Manganese 0.68~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium 1.10~1.82%；Nickel 0.90
~1.50%；Molybdenum 0.65~1.02%；Vanadium 0.22~0.34%；The content summation of other components including titanium, tungsten and niobium≤
0.30%, wherein tungsten is less than 0.1%；Iron is surplus.
The present invention advocates that the second optimisation technique scheme for realizing invention the first invention purpose is further：One kind is for high speed
The alloy cast steel of train brake disk, which is characterized in that the weight percentage of its component and its each component is：Carbon 0.18~
0.26%；Silicon 0.30~0.50%；Manganese 0.81~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium 1.10~1.70%；Nickel 0.96
~1.50%；Molybdenum 0.65~1.00%；Vanadium 0.22~0.34%；The content summation of other components including titanium, tungsten and niobium≤
0.30%, wherein tungsten is less than 0.1%；Iron is surplus.
It is preferred that the nickel content is 0.96~1.40%.
Further preferably, the nickel content is 1.22~1.40%.
It is more preferably to all of above technical solution：A kind of alloy cast steel of brake disc of high-speed train, feature
Be, titanium, tungsten and the niobium that the other components include be it is therein any one or any two or three kinds；Its content is titanium
≤ 0.08%, tungsten≤0.04%, niobium≤0.05%.
It is more preferably to all of above technical solution：A kind of alloy cast steel of brake disc of high-speed train, feature
It is, the content of titanium, tungsten and niobium that the other components include is：Titanium≤0.06%, tungsten≤0.03%, niobium≤0.04%.
It is more preferably to all of above technical solution：It is characterized in that, the gold after the alloy cast steel heat treatment
Phase constitution is Soxhlet body tissue.
The mechanical performance index reached after alloy cast steel heat treatment defined by all of above technical solution：Tensile strength
≥1050MPa；Yield strength >=935MPa；Elongation percentage >=14%；The contraction percentage of area >=35%；Ball hardness number be 300~
388HBW。
Alloy cast steel defined by all of above technical solution, the mechanical performance index reached after heat treatment：Tension is strong
Degree >=1050MPa；Yield strength >=935MPa；Elongation percentage >=14%；The contraction percentage of area >=35%；Ball hardness number be 311~
388HBW。
The present invention also provides a kind of one of the above made of the alloy cast steel defined by all of above technical solution
Brake disc of high-speed train.
Based on the preferred of each component content described above, the present invention also advocates to realize the third technical solution of the first purpose
For：The weight percentage of a kind of alloy cast steel for brake disc of high-speed train, component and its each component is：Carbon 0.18~
0.26%；Silicon 0.30~0.50%；Manganese 0.68~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium 1.10~1.82%；Nickel 0.90
~1.50%；Molybdenum 0.65~1.02%；Vanadium 0.22~0.34%；The content summation of other components including titanium, tungsten and niobium≤
0.30%, wherein tungsten is less than 0.1%；Iron is surplus.
Further, the present invention also advocates that the 4th technical solution for realizing the first purpose is：One kind being used for bullet train system
The weight percentage of the alloy cast steel of Moving plate, component and its each component is：Carbon 0.18~0.26%；Silicon 0.30~0.50%；
Manganese 0.81~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium 1.10~1.70%；Nickel 0.96~1.50%；Molybdenum 0.65~
1.00%；Vanadium 0.22~0.34%；Content summation≤0.30% of other components including titanium, tungsten and niobium, wherein tungsten are less than
0.1%；Iron is surplus.
The second object of the present invention, which is to provide, a kind of can further improve the mechanical property of the alloy cast steel, reduce it
The heat treatment method of the aforementioned alloy cast steel of deformation and crackle tendency.
The second object of the present invention is realized by providing the heat treatment method of following alloy cast steels.
A method of it being heat-treated the alloy cast steel as described in the aforementioned technical solution for realizing its first purpose, with the conjunction
The casting of golden cast steel is heat treatment object, includes normalized treatment and modifier treatment successively：
The normalized treatment, be will deal with objects be warming up to 900 DEG C~980 DEG C, heat preservation 3.5~5 hours after, it is air-cooled to normal
Temperature；
The modifier treatment, including quenching treatment is first carried out, the quenching treatment is by the processing pair Jing Guo normalized treatment
After being warming up to 900 DEG C~980 DEG C, keeping the temperature 3.5~5 hours, water quenching；Then carry out temper, the temper be by
The process object of quenched processing be warming up to 580~650 DEG C, heat preservation 3.5~5 hours after, air-cooled or water cooling to room temperature.
It is preferred that in the heat treatment method of the alloy cast steel, when carrying out the normalized treatment and quenching treatment, when used
Equipment for Heating Processing when not adjusting the function of heating rate, the temperature-rise period of normalized treatment and quenching treatment is to rise first
After temperature to 650 DEG C~700 DEG C, heat preservation 1~2 hour, then it is warming up to 900 DEG C~980 DEG C；It is adjusted when Equipment for Heating Processing used has
When saving the function of heating rate, the charging temperature of the process object is less than or equal to 200 DEG C, the liter of normalized treatment and quenching treatment
Warm speed is 120~200 DEG C/h.
Further preferably, the heat treatment method of the alloy cast steel,
The temperature of the normalized treatment is 921 DEG C~980 DEG C；
The quenching treatment temperature of the modifier treatment is 921 DEG C~980 DEG C；The temperature of temper is 621~650 DEG C.
And when carrying out the normalized treatment and quenching treatment, when Equipment for Heating Processing used does not adjust the function of heating rate,
The temperature-rise period of normalized treatment and quenching treatment is to be warming up to 650 DEG C~700 DEG C first, after heat preservation 1~2 hour, then is warming up to
921 DEG C~980 DEG C；When Equipment for Heating Processing used has the function of adjusting heating rate, the charging temperature of process object is small
In equal to 200 DEG C, the heating rate of normalized treatment and quenching treatment is 120~200 DEG C/h.
Third purpose of the present invention also provides a kind of brake disc of high-speed train made of foregoing alloy cast steel.
The beneficial effects are mainly as follows：
（1）By to manganese, nickel, chromium, molybdenum, the reasonable selection of the multiple alloying components of vanadium and to including titanium, tungsten, niobium etc.
Other components control, ensure cast steel intensity increase while, moreover it is possible to ensure material plasticity and toughness not by larger shadow
It rings, avoids the phenomenon that causing material plasticity and toughness to be decreased obviously because of intensity increase.Obtained alloy cast steel material synthesis
Good mechanical performance.
（2）By to manganese, nickel, chromium, molybdenum, the multiple alloying components of vanadium and its rational proportion with the main components such as carbon, silicon, carrying
The high quenching degree and thermostrength of alloy cast steel material, and normal temperature strength and elevated temperature strength have also obtained carrying by a relatively large margin
It is high.
（3）By to manganese, nickel, chromium, molybdenum, the multiple alloying components of vanadium and its with other main components such as carbon, silicon rationally match
When to the control of the other components including titanium, tungsten, niobium etc., the wearability and anti-crack of alloy cast steel material of the invention
Property is better than the prior art.The ball hardness number of the alloy cast steel material obtained using technical solution of the present invention reaches 300~
388HBW（It is shown in Table 6）.
（4）For the alloy cast steel material of the present invention after heat treatment appropriate, crystal grain refinement further improves alloy cast steel
Tensile strength, yield strength and the toughness of material, elevated temperature strength and plasticity are also obviously improved, deformation and crackle tendency
It is small.
（5）The mechanical performance index that the alloy cast steel of the present invention is after heat treatment reached is as follows：Tensile strength >=
1050MPa；Yield strength >=935MPa；Elongation percentage >=14%；The contraction percentage of area >=35%；Ball hardness number is 300~388HBW；
It is fully able to meet the disc material requirement of the bullet train of 250Km/h or more.
In addition, the alloy cast steel of the present invention using conventional electric induction furnace process for smelting steel or similar process for making into
Prepared by row, it is convenient to smelt, and casting is easy, and manufacturing cost reduces, and is more advantageous to industrialized implementation and popularization.
With the high-speed EMUs brake disc first sample of the alloy cast steel material manufacture of the present invention, the trial operation in high-speed EMUs
Test result show with the present invention alloy cast steel material manufacture high-speed EMUs brake disc stable quality, have excellent performance,
Service life is long（It is shown in Table 8）；Meanwhile compared with same kind of products at abroad, manufacture is easy, and also has higher superiority of effectiveness.
In conclusion since the present invention passes through to carbon, silicon in the alloying components such as manganese, chromium, nickel, molybdenum, vanadium and cast steel material etc.
The reasonable selection of other main components and with the control when to the other components including titanium, tungsten, niobium etc., in heat appropriate
After processing, make crystal grain refinement, improve the quenching degree and thermostrength of alloy cast steel material, normal temperature strength and elevated temperature strength are larger
Amplitude improves, and obtained alloy cast steel not only has higher tensile strength and yield strength, also has in terms of modeling, toughness preferably
Performance, comprehensive mechanical property is excellent.Meanwhile alloy cast steel material of the invention also has good wear-resisting property, deformation and crackle
It is inclined to small, smelting convenience, the easy advantage low with manufacturing cost of casting, is conducive to extend the use of brake disc of high-speed train
Service life and industrial application.
Description of the drawings
The present invention will be further described below with reference to the drawings.
Fig. 1 is nickel content and the normal temperature strength of alloy cast steel and the relational graph of elevated temperature strength.
Fig. 2 is nickel content and the elongation of alloy cast steel and the relational graph of the contraction percentage of area.
Fig. 3 be specific embodiments of the present invention hardening heat, it is quenched before whether normalized treatment and alloy cast steel tension it is strong
The relational graph of degree.
Fig. 4 be specific embodiments of the present invention hardening heat, it is quenched before whether normalized treatment and alloy cast steel elongation
Relational graph.
Fig. 5 is the hardening heat and alloy cast steel tensile strength, the relational graph of yield strength of specific embodiments of the present invention.
Fig. 6 is the relationship of the hardening heat and the elongation of alloy cast steel, the contraction percentage of area of specific embodiments of the present invention
Figure.
Fig. 7 is the figure when metallographic structure of the alloy cast steel of specific embodiments of the present invention after heat treatment amplifies 100 times
Piece.
Fig. 8 is the figure when metallographic structure of the alloy cast steel of specific embodiments of the present invention after heat treatment amplifies 500 times
Piece.
Specific implementation mode
In relation to the present invention before address other technologies content, feature and effect, detailed description below specifically
In bright, can clearly it present.However it will be appreciated by persons skilled in the art that the specific descriptions with reference to attached drawing herein only
For exemplary purposes, the present invention is not limited thereto.
The chemical composition ranges of the alloy cast steel of 1 present invention of table（Weight percent contains and divides content %）
The component of the alloy cast steel of the present invention and its weight percent ranges of each component are as shown in table 1.
Specific technical solution is：A kind of weight of alloy cast steel for brake disc of high-speed train, component and its each component
It is as follows to measure percentage composition：Carbon 0.18~0.26%, silicon 0.16~0.50%；Manganese 0.55~1.40%；Phosphorus is less than or equal to 0.03%；Sulphur is small
In equal to 0.03%；Chromium 0.90~2.00%；Nickel 0.71~1.80%；Molybdenum 0.65~1.20%；Vanadium 0.20~0.35%；Including titanium, tungsten
It is less than or equal to≤0.30% with the content summation of the other components including niobium, wherein tungsten is less than 0.1%；Iron is surplus.
In order to further increase the performance of alloy cast steel, each element component can be carried out following preferred：
It is preferred that the content of the manganese is 0.60~1.40%；Further preferably, the content of the manganese is 0.68~1.40%；Into one
Step is preferred, and the content of the manganese is 0.81~1.40%；Still more preferably, the content of the manganese is 0.84~1.20%.
It is preferred that the content of the chromium is 1.00~2.00%；Further preferably, the content of the chromium is 1.10~2.00%；Into one
Step is preferred, and the content of the chromium is 1.10~1.82%；Still more preferably, the content of the chromium is 1.10~1.70%.
It is preferred that the content of the nickel is 0.80~1.60%；Further preferably, the content of the nickel is 0.90~1.50%；Into one
Step is preferred, and the content of the nickel is 0.72 ~ 1.5%.Still more preferably, the content of the nickel is 0.96~1.50%；More into one
Step is preferred, and the content of the nickel is 0.96~1.40%.
It is preferred that the content of the molybdenum is 0.65~1.19%；Further preferably, the content of the molybdenum is 0.65~1.10%；Into one
Step is preferred, and the content of the molybdenum is 0.65~1.02%；Still more preferably, the content of the molybdenum is 0.65~1.00%；Again into
One step is preferred, and the content of the molybdenum is 0.65~0.96%.
It is preferred that the content of the vanadium is 0.20~0.34%；Further preferably, the content of the vanadium is 0.22~0.34%.
It is preferred that the content of the silicon is 0.22~0.50%；Further preferably, the content of the silicon is 0.25~0.50%；Into one
Step is preferred, and the content of the silicon is 0.30~0.50%, and further preferably, the content of the silicon is 0.31~0.49%.
It is preferred that the content of the carbon is 0.18~0.25%.
It is preferred that phosphorus content is less than or equal to 0.03%, sulfur content is less than or equal to 0.02%；
Further preferably, the content of the phosphorus be less than or equal to 0.025%, the content of the preferably described sulphur be less than or equal to
0.013%。
In the other elements, other than some common harmful alloying elements that should be controlled, such as tin, antimony, arsenic, copper
Deng；Can also include one or more of elements such as some alloying elements such as titanium, tungsten, niobium beneficial to the performance of steel.
It is preferred that in titanium, tungsten, niobium element included by the other elements any one or any two or three kinds；Its
Content is titanium≤0.08%, tungsten≤0.04%, niobium≤0.05%.
Further preferably, the other elements include in titanium, tungsten, niobium element any one or any two or three kinds；
Its content is titanium≤0.06%, tungsten≤0.03%, niobium≤0.04%.
Based on the preferred of each component content described above, the another technical solution that the present invention advocates is：One kind is for height
The weight percentage of the alloy cast steel of fast train brake disk, component and its each component is：Carbon 0.18~0.26%；Silicon 0.25
~0.50%；Manganese 0.60~1.40%；Phosphorus is less than or equal to 0.03%；Sulphur is less than or equal to 0.02%；Chromium 1.00~2.00%；Nickel 0.80~
1.60%；Molybdenum 0.65~1.10%；Vanadium 0.20~0.35%；The content summation of other components including titanium, tungsten and niobium be less than etc.
In 0.30%, wherein tungsten is less than 0.1%；Iron is surplus.
Based on the preferred of each component content described above, the another technical solution that the present invention also advocates is：One kind is for height
The weight percentage of the alloy cast steel of fast train brake disk, component and its each component is：Carbon 0.18~0.26%；Silicon 0.30
~0.50%；Manganese 0.68~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium 1.10~1.82%；Nickel 0.90~1.50%；Molybdenum
0.65~1.02%；Vanadium 0.22~0.34%；Content summation≤0.30% of other components including titanium, tungsten and niobium, wherein tungsten
Less than 0.1%；Iron is surplus.
Further, a kind of technical solution that the present invention also advocates is：A kind of alloy for brake disc of high-speed train is cast
The weight percentage of steel, component and its each component is：Carbon 0.18~0.26%；Silicon 0.30~0.50%；Manganese 0.81~
1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium 1.10~1.70%；Nickel 0.96~1.50%；Molybdenum 0.65~1.00%；Vanadium 0.22
~0.34%；Content summation≤0.30% of other components including titanium, tungsten and niobium, wherein tungsten are less than 0.1%；Iron is surplus.
The chemical composition ranges of the preferred embodiment of alloy cast steel of the present invention are as shown in table 2.
The chemical composition ranges of the preferred embodiment of the alloy cast steel of 2 present invention of table（%）
Other elements in the application include two classes, a kind of other elements be to the performance of steel under normal conditions it is harmful, such as
Tin, antimony, arsenic, copper, hydrogen etc.；Another kind of other elements are beneficial, such as titanium, tungsten, niobium to the performance of steel；In the other elements
In, other than some common harmful alloying elements that should be controlled, such as tin, antimony, arsenic, copper；It can also be including some to steel
In the beneficial alloying element of performance, such as titanium, tungsten, niobium element any one or any two and three kinds of combination.Its content
Generally titanium≤0.08%, tungsten≤0.1%, niobium≤0.05%；Preferred content is titanium≤0.08%, tungsten≤0.04%, niobium≤
0.05%；Further preferred content is titanium≤0.06%, tungsten≤0.03%, niobium≤0.04%.
The present invention also provides some specific preferred embodiments, each preferred embodiment is arranged by serial number, is followed successively by 1#
~12#.Their chemical composition is as shown in Table 3 below, further includes other elements in preferred embodiment 1#~12#, and other
The content summation of element be less than or equal to 0.30%, including in titanium, tungsten, niobium element any one or any two and three kinds
Combination, content be titanium≤0.08%, tungsten≤0.04%, niobium≤0.05%, iron is surplus.
3 chemical composition of table (%)
Alloy cast steel made from above preferred embodiment of the present invention is conditioned, and treated that metallographic structure is Soxhlet body tissue.
Its corresponding mechanical property is as shown in Table 4 below.
4 mechanical property of table
Such as in order to obtain the alloy cast steel of more preferable performance, the content of other elements can be further controlled, including titanium≤
0.06%, tungsten≤0.03%, niobium≤0.04%.
The Mechanics Performance Testing of the alloy cast steel of the present invention by 228 metal material tensile testing at ambient temperature of GB/T and
231.1 metal Brinell hardness test part 1s of GB/T:Test method carries out.As known from Table 5, alloy cast steel of the invention is complete
Requirement of 250km/h or more the brake disc of high-speed train to mechanical properties of cast steel all can be met.Therefore, alloy cast steel of the invention can
For manufacturing brake disc of high-speed train.
The mechanical property of the alloy cast steel of 5 present invention of table
The alloy cast steel of the present invention is prepared using conventional electric induction furnace process for smelting steel.
Effect and its preferred content of each chemical composition played in cast steels melting contained by the alloy cast steel of the present invention
Range can be found in the description of front relevant portion.
The heat treatment method of the alloy cast steel of the present invention is described below, in other words with the alloy cast steel casting or the conjunction
Golden cast steel brake disc blank is the heat treatment method of process object.Specifically heat treatment process is：
Normalized treatment is carried out first, after being warming up to 900 DEG C~980 DEG C by the casting or blank, keep the temperature 3.5~5 hours,
It is air-cooled to room temperature；Such as：It is air-cooled to room temperature by blowing or similar fashion.
Then carry out modifier treatment, first quenching treatment, by through normalized treatment casting or blank be warming up to 900 DEG C~980
DEG C, heat preservation 3.5~5 hours after, water quenching；Temper is then carried out, the casting of quenched processing or blank are warming up to 580~
650 DEG C, heat preservation 3.5~5 hours after, air-cooled or water cooling to room temperature.Such as：It is air-cooled or pass through water spray by blowing or similar fashion
Or similar fashion water cooling is to room temperature.
It is preferred that in the heat treatment method of above-mentioned alloy cast steel casting or alloy cast steel brake disc blank, progress is described just
When fire processing and quenching treatment, the Equipment for Heating Processing for adjusting heating rate, the liter of normalized treatment and quenching treatment could be used without
Warm process is to be warming up to 650 DEG C~700 DEG C first, after heat preservation 1~2 hour, then is warming up to 900 DEG C~980 DEG C；Using with
The Equipment for Heating Processing of heating rate function, casting or blank charging temperature are adjusted less than or equal to 200 DEG C, at normalized treatment and quenching
The heating rate of reason is 120~200 DEG C/h.Certain heating rate is controlled, alloy cast steel materials microstructure can be made in this way
In phase transformation, phase transformation is abundant, further eliminates the change of alloy cast steel casting or alloy cast steel brake disc blank in heating heating process
Shape and crackle tendency.Can avoid causing thermal stress big since heating rate is too fast, make the present invention alloy cast steel casting or
Alloy cast steel brake disc blank is deformed the danger with crackle.
Further preferably, the heat treatment method of above-mentioned alloy cast steel casting or the alloy cast steel brake disc blank,
The temperature of the normalized treatment is 921 DEG C~980 DEG C, air-cooled to room temperature after keeping the temperature 3.5~5 hours；
Then the modifier treatment is carried out, quenching treatment temperature is 921 DEG C~980 DEG C, after heat preservation 3.5~5 hours, water
It quenches；Temper is then carried out, 621~650 DEG C is warming up to, keeps the temperature 3.5~5 hours, air-cooled or water cooling to room temperature.And carry out institute
When stating normalized treatment and quenching treatment, the Equipment for Heating Processing for adjusting heating rate function is could be used without, temperature-rise period is, first
It is warming up to 650 DEG C~700 DEG C, after heat preservation 1~2 hour, then is warming up to 921 DEG C~980 DEG C；Using with adjusting heating rate work(
Less than or equal to 200 DEG C, the heating rate of normalized treatment and quenching treatment is for the Equipment for Heating Processing of energy, casting or blank charging temperature
120~200 DEG C/h.
Alloy cast steel casting or alloy cast steel brake disc the blank mechanical property after heat treatment of the present invention is：Tension is strong
Degree is more than or equal to 1050MPa, and yield strength is more than or equal to 935MPa, and elongation percentage is more than or equal to 14%, and the contraction percentage of area is more than or equal to
35%, ball hardness number is 300 HBW~388HBW.
The alloy cast steel casting of the present invention or the heat treatment process of alloy cast steel brake disc blank are first to carry out normalized treatment,
Modifier treatment is carried out again（Quenching+tempering）.Normalized treatment is first carried out, as-cast structure in cast structure and coarse can be eliminated
Crystal grain, thinning microstructure；Modifier treatment is carried out again（Quenching+tempering）Afterwards, the uniform Soxhlet body tissue of fine microstructures, material can be obtained
Material normal temperature strength increases substantially, and toughness also slightly improves.Influence of the normalized treatment to the alloy cast steel mechanical property of the present invention
See Fig. 3 and Fig. 4, it can be seen that at the same have normalized treatment and modifier treatment step alloy cast steel casting ratio without normalizing
Processing only carries out the casting of the alloy cast steel of modifier treatment, has in two indexs of tensile strength and elongation apparent excellent
Gesture.
In the specific heat treatment embodiment of alloy cast steel of the present invention, quenched within the scope of 850 DEG C~1020 DEG C
Fig. 5 and Fig. 6 are shown in heat treatment, influence of the hardening heat to the mechanical property of the alloy cast steel of the present invention.
By Fig. 5, Fig. 6 it is found that with hardening heat raising, the intensity of alloy cast steel of the invention slightly improves, and plasticity
Fall after rising, quenched within the scope of 900~980 DEG C, the mechanical property of alloy cast steel of the invention can meet 250km/h with
Upper high-speed EMUs brake disc is more than or equal to 1050MPa, surrender to the mechanical property requirements of alloy cast steel material, i.e. tensile strength
Intensity be more than or equal to 935MPa, elongation percentage be more than or equal to 14%, the contraction percentage of area be more than or equal to 35%, ball hardness number be 300~
388HBW。
The metallographic structure of the present invention after heat treatment is Soxhlet body tissue, and the specific form of 100 times of amplification is shown in Fig. 7, puts
Big 500 times of specific form is shown in Fig. 8.
Table 6 show the chemical composition of a preferred embodiment of the present invention and a kind of brake disc used in the prior art
Comparison.
The chemical composition of 6 embodiment of the present invention of table and the prior art compares
Table 7 show 6# of the embodiment of the present invention and is compared with the mechanical property of the prior art respectively after heat treatment.
The mechanical property of 7 6# embodiments of the present invention of table and the prior art compares
As can be seen from Table 7, the preferred embodiment of the present invention passes through the science to various alloying elements, rational proportion, institute
The comprehensive mechanical property of alloy cast steel material obtained is better than the prior art.The especially alloy cast steel of the preferred embodiment of the present invention
Tensile strength, yield strength, hardness performance is obviously higher than the prior art.
Table 8 show the thermal fatigue test of the preferred embodiment of the present invention and the prior art as a result, imitating brake disc makes
With situation, sample is heated to 600 DEG C, heat preservation a period of time, is then quickly put into 20 DEG C of water, after being repeated 600 times,
Under metallographic microscope, the crack propagation situation of notch is observed.It is in table 8 statistics indicate that：The cracking resistance of the preferred embodiment of the present invention
Line performance is substantially better than the prior art.
The thermal fatigue test Comparative result of table 8 6# of the embodiment of the present invention and the prior art
Table 9 show the 1 of the preferred embodiment of the present invention and the prior art：1 brake power testing stand Braking test, i.e.,
Situation, retardation test of being stopped in emergency repeatedly are actually used according to brake disc（Axis weight 15.5t, brake lining pressure 23kN × 2, system
Dynamic initial velocity is 250km/h）, until fire check generation, record the retardation test number that stops in emergency.It can be with from the result in table 9
Find out：The heat resistanceheat resistant crack performance of the preferred embodiment of the present invention is better than the prior art, and service life is long.
The 1 of 9 6# of the embodiment of the present invention of table and the prior art:1 Braking test compares
| Sample name | Generate the braking number of fire check |
| 6# of the embodiment of the present invention | 154 |
| The prior art | 131 |
By above-mentioned contrast test it is found that the alloy cast steel ingredient and performance of the present invention be entirely capable of meeting 250km/h or more it is high
The performance requirement of fast EMU brake disc, and there is better toughness and tenacity.
The present invention passes through to the reasonable selection of the alloying components such as manganese, nickel, chromium, molybdenum and vanadium in alloy cast steel and its and carbon, silicon
Rational proportion etc. other chemical compositions and the reasonable control to other elements make the various chemical compositions in alloy cast steel obtain
Relatively rational matching was obtained, to make the alloy cast steel material of the present invention after heat treatment appropriate, crystal grain refinement improves
Quenching degree and thermostrength and cracking resistance energy, normal temperature strength and elevated temperature strength are also increased substantially, and are obtained excellent
Comprehensive mechanical property.
The present invention optimizes and revises the content of chromium, molybdenum, v element by properly increasing the content of manganese, nickel, has both increased strong
Degree, in turn avoid the larger impact to plasticity and toughness, to make alloy cast steel produced by the present invention overcome the prior art because
Intensity increases and deficiency that plasticity and toughness are decreased obviously, and comprehensive mechanical property is significantly improved.
Further, since the heat treatment process of the casting of the alloy cast steel or alloy cast steel of the present invention is first to carry out at normalizing
Reason, then carry out modifier treatment（Quenching+tempering）.Normalized treatment is first carried out, as-cast structure in cast structure and thick can be eliminated
Big crystal grain, thinning microstructure, then carry out modifier treatment（Quenching+tempering）Afterwards, the uniform sorbite group of fine microstructures can be obtained
It knits, tensile strength, the yield strength of material are further improved；Normal temperature strength and elevated temperature strength also have carrying by a relatively large margin
It rises；Casting deformation and crackle tendency are smaller.
Compared with prior art, advantages of the present invention is fairly obvious：It is alloying element type, the quantity conjunction of addition first
Reason, each chemical composition are easy to control, and it is convenient to smelt, and casting is easy；Casting deformation and crackle tendency are small, have excellent founder
Skill performance is more advantageous to industrial production control and reduces manufacturing cost.Followed by reasonable heat treatment process, simple, favorably
In application of the material in railway industry and Other Engineering field.
Additionally need, it is noted that brake disc operating mode in braking the heat that generates it is relatively high, it is desirable that material it is heat-resisting
It to be got well with thermal diffusivity, wearability is good.For alloy cast steel, usual hardness and strength are directly proportional, and intensity is high, hardness
The wearability of height, respective material might as well.Due to the present invention alloy cast steel material hardness than prior art higher,
Wearability is also significantly better than the prior art.
The alloy cast steel of the present invention can be used to cast railway component, be especially suitable for the steel alloys such as brake disc of high-speed train
Casting, can also be used to cast other has a component of similar mechanical property requirements, such as draw bar, buffer, hitch and its
Its Working machine component.
Claims (12)
1. a kind of alloy cast steel for brake disc of high-speed train, which is characterized in that its component and its weight percent of each component
Content is：Carbon 0.18~0.26%；Silicon 0.25~0.50%；Manganese 0.60~1.40%；Phosphorus≤0.03%；Sulphur≤0.02%；Chromium
1.00~2.00%；Nickel 0.96~1.15% or 1.22~1.40%；Molybdenum 0.65~1.10%；Vanadium 0.20~0.35%；Including
Content summation≤0.30% of other components including titanium, tungsten and niobium, wherein tungsten are less than 0.1%；Iron is surplus.
2. alloy cast steel according to claim 1, which is characterized in that the manganese content is 0.68~1.40%, the silicon
Content is 0.30~0.50%.
3. alloy cast steel according to claim 2, which is characterized in that the manganese content is 0.81~1.40%.
4. alloy cast steel according to claim 3, which is characterized in that the manganese content is 0.84~1.20%.
5. a kind of alloy cast steel for brake disc of high-speed train, which is characterized in that its component and its weight percent of each component
Content is：Carbon 0.18~0.26%；Silicon 0.30~0.50%；Manganese 0.68~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；
Chromium 1.10~1.82%；Nickel 0.96~1.15% or 1.22~1.40%；Molybdenum 0.65~1.02%；Vanadium 0.22~0.34%；Packet
Content summation≤0.30% of the other components including titanium, tungsten and niobium is included, wherein tungsten is less than 0.1%；Iron is surplus.
6. alloy cast steel according to claim 5, which is characterized in that the weight percentage of its component and its each component
It is：Carbon 0.18~0.26%；Silicon 0.30~0.50%；Manganese 0.81~1.40%；Phosphorus≤0.025%；Sulphur≤0.013%；Chromium
1.10~1.70%；Nickel 0.96~1.15% or 1.22~1.40%；Molybdenum 0.65~1.00%；Vanadium 0.22~0.34%；Including
Content summation≤0.30% of other components including titanium, tungsten and niobium, wherein tungsten are less than 0.1%；Iron is surplus.
7. alloy cast steel according to claim 6, it is characterised in that：The nickel is 0.96~1.15%.
8. alloy cast steel according to claim 6, it is characterised in that：The nickel is 1.22~1.40%.
9. alloy cast steel according to claim 1, which is characterized in that titanium, tungsten and the niobium that the other components include are them
In any one or any two or three kinds；Its content is titanium≤0.08%, tungsten≤0.04%, niobium≤0.05%.
10. alloy cast steel according to claim 1, which is characterized in that titanium, tungsten and the niobium that the other components include
Content is：Titanium≤0.06%, tungsten≤0.03%, niobium≤0.04%.
11. alloy cast steel according to any one of claims 1 to 10, which is characterized in that institute after the alloy cast steel heat treatment
The mechanical performance index reached：Tensile strength >=1050MPa；Yield strength >=935MPa；Elongation percentage >=14%；The contraction percentage of area
>=35%；Ball hardness number is 311~388HBW.
12. brake disc of high-speed train made of a kind of alloy cast steel as described in as any such as claim 1 to 11.
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| CN201610235376.XA CN105779893B (en) | 2012-06-28 | 2012-06-28 | Alloy cast steel for brake disc of high-speed train and the brake disc of high-speed train that is manufactured by the alloy cast steel |
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| CN106566999A (en) * | 2016-11-04 | 2017-04-19 | 南京工程学院 | Wear-resisting material used for brake disc of high-speed train and preparation method for wear-resisting material |
| CN109161650B (en) * | 2018-10-30 | 2020-07-28 | 中车戚墅堰机车车辆工艺研究所有限公司 | Low-alloy cast steel, manufacturing method and application thereof |
| EP3715490B1 (en) * | 2019-03-29 | 2023-08-23 | Bayerische Motoren Werke Aktiengesellschaft | Method of casting steel alloy component and cast component |
| CN113652600A (en) * | 2021-07-02 | 2021-11-16 | 南京钢铁有限公司 | Steel for brake disc of high-speed rail and heat treatment method thereof |
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| CN101343716A (en) * | 2008-06-27 | 2009-01-14 | 南车戚墅堰机车车辆工艺研究所有限公司 | Low alloy cast steel |
| JP4207841B2 (en) * | 2003-06-30 | 2009-01-14 | 住友金属工業株式会社 | Steel for brake disc and disc brake device |
| CN101613828A (en) * | 2009-07-16 | 2009-12-30 | 首钢总公司 | Super-thick steel plate for low yield ratio buildings with 460 MPa grade yield strength and manufacture method |
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| JP4207841B2 (en) * | 2003-06-30 | 2009-01-14 | 住友金属工業株式会社 | Steel for brake disc and disc brake device |
| CN101343716A (en) * | 2008-06-27 | 2009-01-14 | 南车戚墅堰机车车辆工艺研究所有限公司 | Low alloy cast steel |
| CN101613828A (en) * | 2009-07-16 | 2009-12-30 | 首钢总公司 | Super-thick steel plate for low yield ratio buildings with 460 MPa grade yield strength and manufacture method |
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